Delivery means for conveying a fixed charge of molten metal to a

Details Delivery means for conveying a fixed charge of molten metal to a Delivery means for conveying a fixed charge of molten metal to a

1990-11-20

1992-03-03

Kastler, S.

Dispensing

Molten metal dispensing

Flow controllers or assists

266239, B67D 110

Patent

active

050924990

ABSTRACT:
This invention relates to a delivery assembly for delivering molten metal, to a die-casting machine. The system includes a die-casting liquid metal injector with an operative piston having a cylindrical shuttle valve within the assembly and providing for a lower end portion of the assembly to communicate directly to a reservoir of molten metal, particularly corrosive molten metal such as liquid aluminum or the like. In that respect, the injector surface having contact with the corrosive liquid metal are preferably made of a fine ceramic or composite thereof and in the preferred embodiment by partially stabilized Zirconia. The piston, during its molten metal charging stroke, moves the shuttle away from closing off the inflow conduit which communicates to the liquid metal reservoir supply and the internal cavity defined by the assembly is charged with liquid metal. On the compressive stroke of the piston, the shuttle first moves forward to close off the inflow channel insuring no leakage of molten metal back to the supply reservoir and at the same time, the metal within the piston chamber now communicates with an outflow orifice directly to a nozzle which injects liquid metal directly into a mold cavity. A fixed charge for the cavity is achieved.

REFERENCES:
patent: 2058378 (1936-10-01), Freund
patent: 2224978 (1940-12-01), Morin
patent: 2224981 (1940-12-01), Morin
patent: 2609575 (1952-09-01), Morin
patent: 3469621 (1969-09-01), Fulgenzi
patent: 3618831 (1971-11-01), Goodwin et al.
patent: 3652073 (1972-03-01), Lewis
patent: 4078706 (1978-03-01), Hanuszczak
patent: 4593741 (1986-06-01), Caughtery

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